Convert joule to calorie
1 J = 0.2390057361 cal
1 J = 0.23901 cal
1 J in every energy unit
| electron volt | 6.2415e+18 eV |
| hartree | 2.2937e+17 Eh |
| kiloelectron volt | 6.2415e+15 keV |
| megaelectron volt | 6,241,500,000,000 MeV |
| gigaelectron volt | 6,241,500,000 GeV |
| nanojoule | 1,000,000,000 nJ |
| erg | 10,000,000 erg |
| teraelectron volt | 6,241,500 TeV |
| microjoule | 1,000,000 µJ |
| millijoule | 1,000 mJ |
| inch-pound | 8.8507 in·lb |
| joule | 1 J |
| foot-pound | 0.73756 ft⋅lb |
| calorie | 0.23901 cal |
| calorie (International Table) | 0.23885 cal IT |
| kilojoule | 0.001 kJ |
| BTU (thermochemical) | 0.00094845 BTU th |
| British thermal unit | 0.00094782 BTU |
| watt-hour | 0.00027778 Wh |
| kilocalorie | 0.00023901 kcal |
| megajoule | 0.000001 MJ |
| horsepower-hour | 3.7251e-07 hp·h |
| kilowatt-hour | 2.7778e-07 kWh |
| therm | 9.4782e-09 therm |
| gigajoule | 1.0000e-09 GJ |
| million BTU | 9.4782e-10 MMBTU |
| megawatt-hour | 2.7778e-10 MWh |
| ton of TNT | 2.3901e-10 t TNT |
| tonne of oil equivalent | 2.3885e-11 toe |
| terajoule | 1.0000e-12 TJ |
| gigawatt-hour | 2.7778e-13 GWh |
| kiloton of TNT | 2.3901e-13 kt TNT |
| petajoule | 1.0000e-15 PJ |
| terawatt-hour | 2.7778e-16 TWh |
| megaton of TNT | 2.3901e-16 Mt TNT |
| quad | 9.4782e-19 quad |
How the conversion works
Multiply by 0.2390057361 to go from joule to calorie, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? calorie to joule — 1 cal = 4.184 J.
joule to calorie — common values
| 1 J | 0.23900574 cal |
| 2 J | 0.47801147 cal |
| 3 J | 0.71701721 cal |
| 5 J | 1.1950287 cal |
| 10 J | 2.3900574 cal |
| 15 J | 3.585086 cal |
| 20 J | 4.7801147 cal |
| 25 J | 5.9751434 cal |
| 50 J | 11.950287 cal |
| 75 J | 17.92543 cal |
| 100 J | 23.900574 cal |
| 250 J | 59.751434 cal |
| 500 J | 119.50287 cal |
| 1000 J | 239.00574 cal |